Description Of Item: Original pale blue dust wrapper, original dark navy blue cloth cover,174 x 248 mm, 16 plates. Original instruction manual in German in back pocket and English translation of the manual tucked in. Translator James Drever.

Historical Significance: Jakob Stilling (1842 - 1915) was the first to devise pseudoisochromatic plate tests of colour vision in 1877. He was an ophthalmologist in Kassel and later Strassburg, Germany. Stilling J. Methoden zur Prufung des Farbensinnes. Ber Ophthal Ges Heidelberg, 1877; 10:168. Another copy is held at Cat No. 263.